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Bi amp channel as a sub channel ?

#1
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Hello folks,

My current HT receiver (Kenwood VR-7070) is acting flaky so I figured it was time to upgrade. After looking around a bit I seem to feel that I am in a bit of a pickle.

The kenwood receiver is a 6.1 and I've always used the 6th channel as a sub channel instead of the .1 channel (the receiver is designed to do this). I have an old set of Cerwin Vega DX7s and they literally vibrate the nails loose in the drywall, but of course require external amplification. The rest of my speakers are bookshelves (Yamaha NS-M125P) so I have always run all the low/sub through the Cerwins. 

After looking into current receivers I notice that the trend is Bi-amping and I can find no receiver that can be setup to output the sub channel from any of its speaker outputs. After purchasing a new receiver I would rather not have to also purchase either a new Powered Sub woofer or an additional external amp to power the Cerwins. After some review of the Bi-amping theory I was wondering could I just hook my cerwins up to the Bi-amp channel and my fronts (they are only Yamaha NS-M125P bookshelf speakers) to the  high frequency front channel or is this just not going to work?

Does anyone know of a currently available receiver that can output the sub channel at speaker level (preferably sub 700$) or do I find myself in one of those costly significant system upgrade situations?

Your comments and insight are appreciated!
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#2
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What I would do is just bump back the receiver budget to $550 or so and get a sub amp from Parts Express.  I have a pair of passive subs in my second system powered with THIS amp, which I just keep in the cabinet under the TV.  It is stable to 4 ohm so you can hook your two speakers in parallel.  You're much better off in the long run going this way.

BTW, you may think the Cerwin Vegas act like subs, but they don't.  A REAL sub will not just rattle, but give extension the CVs can't even touch.


They flutter behind you, your possible pasts.
Some bright-eyed and crazy, some frightened and lost.
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#3
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Well I decided to try to have the kenwood repaired. I got an estimate from audio/Video service labs for about 150$ and it should be ready next week. Even though I would have loved to have upgraded Ive got Christmas to start gearing up for and well 150 vs 700 is just an economical no brainer.

John
I hear ya on the Cerwins, I've been corrected before on this very site for calling them subs. Although I do know the difference between a sub and a plain woofer I've got to say I have been pleasantly satisfied with the effect from these speakers. I got these Cerwins like 17 years ago and although the mids blew long ago the woofers have strait rocked (I did have to re-surround them once). I would love to upgrade but with the current family situation HT is on back burner, I'm just trying to maintain what capability I have.
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#4
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Phillip, it's not hopeless.  It is completely possible to replace the woofers in the CVs with actual subwoofer drivers, bypass the internal crossover and turn them into more genuine subs for a real song.  No, it won't be as good as a real sub, but by doing measurements of the cabinet, sealing up the openings for the other drivers and running it through sub design software you can have a significant improvement very cheap.  I expect Robert J would be willing to run some numbers or direct you to the software to do it yourself.  There are low end, inexpensive, but respectable sub drivers out there.

Right now you are just getting MORE bass.  This would not only allow for more, but lower bass.


They flutter behind you, your possible pasts.
Some bright-eyed and crazy, some frightened and lost.
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